Improvewsemt



2 She-ets--Sheetil 'GQGAVIL Machines for Grinding Rolls. v910.151,485.

Patented June 2, i874'.

' 2 Sheets--Sheet 2. G. G AVIT.

Machines for Grinding Rolls. N0.l5\,485, Patentedjune2,1874.

V/MW/// l hereinafter fully described.

ENT FFICE.

GORTON GAVIT, OF PHILADELPHIA, PENNSYLVANIA.

IMPROVEMENT IN MACHINES FOR GRINDING ROLLS.

Specification forming part of Letters Patent No. llgl, dated June 2, 1S74; application filed January 29, 187 4.

T0 all whom. 'it may concern:

Be it known that I, GORTON GAVIT, of the city and county of Philadelphia and State of Pennsylvania., have invented an Improvement in Machines for Grinding Rolls, of which the following is a specification:

My invention relates to the combination, with adjustable carriages which carry a pair of grinding-wheels, of a series of pivoted bars for supporting the belt-adjusting device, as

Figure l is a side elevation of my improved machine. Fig. 2, Sheet No. 2, is a vertical section at the line :t of Fig. 1. Pig. 3 is a like section at the line y y.

Like letters of reference in all the figures indicate the same parts.

A is the bed-plate of the machine. B B are the housings. C is the roll to be ground. D I) are pedestals, which support the journals of the roll. E is a slide, which has a longitudinal movement on the V-shaped guides a a., for carrying the grinding-wheels back and forth from end to end of the roll, the movement of the slide being given by the longitudinal screw-rod F. G Gare the g'rindingavlieels, whose shafts H H have their bearings in the cheeks b b of the carriages I I. These blocks are connected with the carriages J J by means of the dovetail guides c c, and have an accurate adjustment thereon by meansof the screw-rods K K for setting the wheels. The carriages J J also have an adjustment toward or from the roll C, being connected with the dovetail guide d of the slide E. L is a drum,

whose journals c c are supported in the upper ends of the housings B B. M is a belt for driving the grinding-wheels. It passes around the drum, the pulleys N N on the shafts H H of said wheel, and the intermediate pulley O of the shaft P. Thus a uniform and simultaneous movement is given to the two wheels by a single belt. `Q Q, are bearings, which support thejournals j' j' of the shaft P. They have a vertical adjustment in the pedestals It It by means of the screw-rods S S for regulating the tightening of the belt M. The pedestals are connected with the horizontal crossbars T T, that have a joint connection with the carriages J J by means of the vertical rods U U, as seen in Figs. l and 2, which admits of the carriages bein g moved inward or outward for a partial adjustment ofthe grinding-wheels G G, above described. On one end of the shaft of the drum L there is a pulley, V, which connects by means of a belt with the motive power. W is a pulley connected with one end of the rolls C. A belt or band, X, connects with this pulley, and the pulley Y on the drum-shaft, for communicating motion to the roll.

I claim as my invention- In a machine. for grinding rolls, in combination with the adjustable carriages I I J J, carryin g the grinding-wheels, the pivoted bars U U U U and T T, for supporting the belt-adjusting device, substantially as described.

GORTON GAVIT.

Vitnesses:

STEPHEN Usquert, A. FURM; BLAIR. 

